Power Storage Device

This non-provisional application is based on Japanese Patent Application No. 2024-204055 filed on Nov. 22, 2024 with the Japan Patent Office, the entire contents of which are hereby incorporated by reference.

The present disclosure relates to a power storage device.

CN 116686151A discloses a battery (power storage device) including a plurality of power storage cells, wherein an electrode terminal of each power storage cell is provided on the side of a lower surface of each power storage cell.

When an impact is applied to the power storage device in which the electrode terminal is provided on the side of a lower surface of each power storage cell, a connection failure may occur in the electrode terminal.

(1) The power storage device according to an aspect of the present disclosure includes: a first power storage cell; a second power storage cell spaced apart from the first power storage cell in a predetermined direction; a third power storage cell spaced apart from the second power storage cell in the predetermined direction; a conductive member; a first spacer disposed between the first power storage cell and the second power storage cell; and a second spacer disposed between the second power storage cell and the third power storage cell. A first terminal is provided on the side of a lower surface of the first power storage cell. A second terminal is provided on the side of a lower surface of the second power storage cell. A third terminal is provided on the side of a lower surface of the third power storage cell. The conductive member is connected to the first terminal, the second terminal and the third terminal. (2) The power storage device according to (1) further includes an accommodation case that includes a lower case and an upper cover, and accommodates the first power storage cell, the second power storage cell and the third power storage cell. Each of the first spacer and the second spacer is integrally formed with the upper cover. (3) The power storage device according to (1) further includes an accommodation case that includes a lower case and an upper cover, and accommodates the first power storage cell, the second power storage cell and the third power storage cell. Each of the first spacer and the second spacer is formed separately from the upper cover. (4) In the power storage device according to (1), the first spacer and the second spacer are integrally formed. (5) In the power storage device according to (3) or (4), each of the first spacer and the second spacer is made of an elastic member. (6) In the power storage device according to any one of (1) to (4), the first spacer is in contact with the first power storage cell and the second power storage cell, and the second spacer is in contact with the second power storage cell and the third power storage cell. (7) A vehicle according to an aspect of the present disclosure includes the power storage device according to any one of (1) to (4), which is mounted below a floor panel. An object of the present disclosure is to provide a power storage device which prevents a connection failure from occurring in an electrode terminal which is provided on the side of a lower surface of a power storage cell when an impact is applied to the power storage device.

The foregoing and other objects, features, aspects and advantages of the present disclosure will become more apparent from the following detailed description of the present disclosure when taken in conjunction with the accompanying drawings.

Hereinafter, embodiments and modifications of the present disclosure will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts will be denoted by the same reference numerals, and the description thereof will not be repeated.

1 FIG. 1 3 10 1 10 3 2 is a diagram schematically illustrating a vehicle including a power storage device according to an embodiment of the present disclosure. A vehicleincludes a vehicle bodyand a power storage device. As an example, the vehiclemay be a hybrid electric vehicle, a plug-in hybrid electric vehicle, or a battery electric vehicle. The power storage deviceis mounted on a bottom portion of the vehicle body(for example, below a floor panel).

2 FIG. 1 FIG. 3 FIG. 1 FIG. 4 FIG. 3 FIG. 5 FIG. 3 FIG. 6 FIG. 7 FIG. is an exploded perspective view schematically illustrating the power storage device illustrated in.is a plan view schematically illustrating a state when an upper cover is removed from the power storage device illustrated in.is a cross-sectional view taken along line IV-IV in.is a cross-sectional view taken along line V-V in.is a diagram schematically illustrating a power storage cell, a bus bar, and an electrical insulation plate on which the bus bar is disposed.is a bottom view of a power storage stack and each bus bar.

2 FIG. 10 11 150 200 170 180 190 300 350 400 With reference to, the power storage deviceincludes six power storage stacks, five cooling plates, a housing, an electrical insulation plate, a panel member, a wiring panel, equipment, an equipment cooler, and a refrigerant pipe.

11 190 11 11 1 1 1 1 11 The six power storage stacksare disposed on the wiring panel. Each power storage stackis formed in a rectangular parallelepiped shape elongated in a first direction. The six power storage stacksare arranged side by side in a second direction intersecting both the first direction and the vertical direction (perpendicular direction). In the present embodiment, the first direction corresponds to the front-rear direction of the vehicle, and the second direction corresponds to the width direction of the vehicle. In the present embodiment, the second direction is orthogonal to both the first direction and the vertical direction (perpendicular direction). The first direction is not limited to the front-rear direction of the vehicle. The second direction is not limited to the width direction of the vehicle. The number of the power storage stacksis not limited to six.

11 100 100 Each power storage stackincludes a plurality of power storage cells. The plurality of power storage cellsare arranged side by side in the first direction.

4 5 FIGS.and 100 100 112 114 With reference to, the plurality of power storage cellsare spaced apart from each other in the first direction. Each power storage cellincludes an electrode bodyand a cell case.

112 112 The electrode bodymay be formed as a wound body which is obtained by winding a positive electrode sheet and a negative electrode sheet with a separator interposed therebetween, or may be formed as a laminated body which is obtained by laminating a positive electrode sheet and a negative electrode sheet with a separator interposed therebetween. The electrode bodyis formed in a shape elongated in the second direction.

114 112 114 114 114 114 114 114 114 114 114 a b a b b a. The cell caseaccommodates the electrode body. The cell caseis formed in a rectangular parallelepiped shape. The cell caseis made of a metal such as aluminum. The cell caseincludes a lower surfaceand an upper surface. The lower surfaceand the upper surfaceare spaced apart from each other in the vertical direction. The upper surfaceis disposed above the lower surface

4 7 FIGS.and 4 FIG. 2 FIG. 100 114 114 120 120 800 100 191 191 a a b h With reference to, each power storage cellfurther includes a cell smoke discharge valve SV. The cell smoke discharge valve SV is provided on the lower surfaceof the cell case. An external terminal(or an external terminal) and a bus bar, which will be described later, are not illustrated in. Each power storage cellis disposed in such a manner that the cell smoke discharge valve SV is located above a through holeof an electrical insulation plateillustrated in.

5 7 FIGS.and 100 120 120 120 120 120 120 a b a b a b With reference to, each power storage cellfurther includes a pair of external terminalsand. In the present embodiment, the external terminalis a positive terminal, and the external terminalis a negative terminal. It should be noted that the external terminalmay be a negative terminal, and the external terminalmay be a positive terminal.

120 120 114 114 120 120 114 114 120 120 114 114 114 114 a b a a b a b a a The pair of external terminalsandare provided on the lower surfaceof the cell case. The pair of external terminalsandare spaced apart from each other in the width direction of the cell case. The width direction of the cell casecorresponds to the second direction. The pair of external terminalsandmay not be provided on the lower surfaceof the cell case, and may be provided on the side of the lower surfaceof the cell case.

2 FIG. 150 11 150 150 150 150 11 With reference to, each cooling plateis disposed between a pair of power storage stacksadjacent to each other in the second direction. Each cooling plateis formed in a plate shape elongated in the first direction. Each cooling platehas a flow path (not shown) through which refrigerant flows in the first direction. The number of the cooling platesis not limited to five. The number of the cooling platesis determined in response to the number of the power storage stacks.

200 200 11 150 190 300 350 400 200 210 220 220 210 The housingis an example of “an accommodation case” in the present disclosure. The housinghouses the six power storage stacks, the five cooling plates, the wiring panel, the equipment, the equipment cooler, and the refrigerant pipe. The housingincludes a lower caseand an upper cover. The upper coveris disposed above the lower case.

210 210 210 212 214 216 216 a b. The lower caseis formed to open upward. The lower caseis made of, for example, a metal such as aluminum. The lower caseincludes a bottom plate, a peripheral wall, a partition wall, and a partition wall

212 212 212 212 212 h The bottom plateis formed in a plate shape. In the present embodiment, the bottom plateis formed in a solid shape. The bottom plateis formed with a plurality of through holes. The bottom platemay be formed in a hollow shape.

5 FIG. 212 212 212 212 212 212 212 a b a b b a. With reference to, the bottom plateincludes a lower surfaceand an upper surface. The lower surfaceand the upper surfaceare spaced apart from each other in the vertical direction. The upper surfaceis disposed above the lower surface

2 FIG. 214 212 214 11 With reference to, the peripheral wallrises from the outer peripheral edge of the bottom plate. The peripheral wallis configured to surround the six power storage stacks.

3 FIG. 214 214 214 214 214 214 214 214 214 214 214 214 214 a b c d a b c d a b c d With reference to, the peripheral wallincludes a side wall, a side wall, an end plate, and an end plate. Each of the side wall, the side wall, the end plate, and the end plateis formed in a hollow shape. Each of the side wall, the side wall, the end plate, and the end platemay be formed in a solid shape.

214 214 214 214 a b a b The side walland the side wallare spaced apart from each other in the second direction. The side walland the side wallare formed to extend in the first direction.

214 214 214 214 214 214 214 214 214 214 c d c d c a b d a b. The end plateand the end plateare spaced apart from each other in the first direction. The end plateand the end plateare formed to extend in the second direction. The end plateconnects one end of the side walland one end of the side wall. The end plateconnects the other end of the side walland the other end of the side wall

214 19 19 19 19 19 19 10 200 200 19 19 200 200 200 19 19 19 19 200 d 2 FIG. The end plateis provided with an air-permeable filmA and an air-permeable filmB (see). The air-permeable filmA and the air-permeable filmB are a waterproof but air-permeable film. Each of the air-permeable filmA and the air-permeable filmB is made of, for example, GORE-TEX (registered trademark). In the power storage device, when an internal pressure of the housingincreases, the gas in the housingis discharged to the outside through the air-permeable filmsA andB. When the internal pressure of the housingdecreases, the gas outside the housingenters the housingthrough the air-permeable filmsA andB. It should be noted that each of the air-permeable filmsA andB may be a cell smoke discharge valve that opens when the internal pressure of the housingbecomes equal to or higher than a reference value. The cell smoke discharge valve may be a check valve.

214 214 214 214 77 77 77 a b c d Each of the side wall, the side wall, the end plate, and the end plateis provided with a fixed member. Each fixed memberis formed in a hollow shape. Each fixed membermay be formed in a solid shape.

77 3 77 214 77 3 79 79 3 1 3 2 77 3 77 2 1 FIG. 4 FIG. 1 FIG. 1 FIG. c a a Each fixed memberis fixed to the vehicle body(see). For example, a fixed memberA is formed on the outer surface of the end plate. With reference to, the fixed memberA is fixed to the vehicle bodyby fastening membersA andB. For example, the vehicle bodyincludes side sills spaced apart from each other in the width direction of the vehicle(see), a cross memberconfigured to connect the side sills, and a floor panel(see). The fixed memberA is fixed to the cross member. The fixed memberA may be fixed to the floor panel.

3 FIG. 216 216 212 214 216 214 216 214 216 216 216 216 11 216 216 216 216 a b a c b d a b a b a b a b With reference to, the partition walland the partition wallare disposed in a region surrounded by the bottom plateand the peripheral wall. The partition wallis disposed adjacent to the end plate. The partition wallis spaced apart from the end platein the first direction. Each of the partition walland the partition wallis formed to extend in the second direction. The partition walland the partition wallare configured to restrain the power storage stacksfrom both sides thereof in the first direction. Each of the partition walland the partition wallis formed in a hollow shape. It should be noted that each of the partition walland the partition wallmay be formed in a solid shape.

4 FIG. 220 210 220 214 c With reference to, the upper coveris provided to close an opening of the lower case. For example, the outer peripheral edge of the upper coveris fixed to the upper end of the end plateby bolts or the like.

2 FIG. 11 150 190 300 350 400 210 220 With reference to, the six power storage stacks, the five cooling plates, the wiring panel, the equipment, the equipment cooler, and the refrigerant pipeare accommodated in a space formed by the lower caseand the upper cover.

170 170 170 170 170 180 212 210 170 212 212 h a 4 FIG. The electrical insulation plateis made of an electrical insulation member (for example, a resin composition). The electrical insulation plateis formed in a plate shape, for example. The electrical insulation plateis formed with a plurality of through holes. The electrical insulation plateis disposed between the panel memberand the bottom plateof the lower case. With reference to, the electrical insulation plateis fixed to the lower surfaceof the bottom plate.

2 FIG. 4 FIG. 180 212 210 180 170 212 212 180 64 180 212 212 180 212 212 64 a a a With reference to, the panel memberis configured to protect the bottom plateof the lower case. The panel memberis formed to cover the electrical insulation plateand the lower surfaceof the bottom plate. The panel memberis formed in a plate shape, for example. With reference to, a seal memberis disposed between the outer peripheral edge of the panel memberand the lower surfaceof the bottom plate. The outer peripheral edge of the panel memberis fixed to the lower surfaceof the bottom platewith the seal memberinterposed therebetween.

2 FIG. 4 FIG. 190 191 850 192 191 191 191 212 212 210 216 216 b a b. With reference to, the wiring panelincludes an electrical insulation plate, a plurality of conductive members, and a plurality of electrical insulation protectors. The electrical insulation plateis made of an electrical insulation member (for example, a resin composition). The electrical insulation plateis formed in a plate shape, for example. The electrical insulation plateis disposed on a portion of the upper surface(see) of the bottom plateof the lower caselocated between the partition walland the partition wall

191 191 191 192 191 192 h h The electrical insulation plateis formed with a plurality of through holes. The electrical insulation plateis provided with an electrical insulation protectorthat closes the through hole. The electrical insulation protectoris made of a heat-resistant member (such as mica).

850 120 120 100 11 850 800 100 11 800 a b 7 FIG. The conductive memberis connected to the external terminalsand the external terminals(see) of the plurality of power storage cellsincluded in the power storage stack. The conductive memberis a so-called bus bar module, and includes a plurality of bus bars. The plurality of power storage cellsincluded in the power storage stackare electrically connected to each other by the plurality of bus bars.

5 6 FIGS.and 191 191 191 191 191 191 191 191 191 800 a b a b b a b c With reference to, the electrical insulation plateincludes a lower surfaceand an upper surface. The lower surfaceand the upper surfaceare spaced apart from each other in the vertical direction. The upper surfaceis disposed above the lower surface. The upper surfaceis formed with a groovein which the bus baris disposed.

800 191 191 191 800 191 800 191 c b c. The bus baris disposed in the grooveformed on the upper surfaceof the electrical insulation plate. The bus baris joined to the electrical insulation plate. The bus barmay be fitted into the groove

6 7 FIGS.and 6 FIG. 800 100 800 800 800 120 100 800 120 100 800 800 120 100 120 100 100 800 a b a a b b a b With reference to, the bus barelectrically connects a pair of power storage cellsadjacent to each other in the first direction. As illustrated in, the bus baris formed with a grooveand a groove. The external terminalprovided on one of the pair of power storage cellsadjacent to each other in the first direction is connected to the groove. The external terminalprovided on the other one of the pair of power storage cellsis connected to the groove. In other words, the bus barconnects the external terminalprovided on one of the pair of power storage cellsadjacent to each other in the first direction and the external terminalprovided on the other one of the pair of power storage cells. Therefore, the plurality of power storage cellsarranged side by side in the first direction are connected in series by the plurality of bus bars.

120 100 800 120 100 800 100 800 100 11 100 800 100 a a b b The external terminalprovided on one of the pair of power storage cellsadjacent to each other in the first direction is connected to the groove, and the external terminalprovided on the other one of the pair of power storage cellsis connected to the groove, whereby the plurality of power storage cellscan be easily connected in series. The bus barmay electrically connect two power storage cells among the plurality of power storage cellsincluded in the power storage stack, and the two power storage cellselectrically connected by the bus barare not limited to a pair of power storage cellsadjacent to each other in the first direction.

4 FIG. 180 212 100 200 With reference to, a space S is formed between the panel memberand the bottom plate. The space S functions as a smoke discharge path for discharging the gas discharged from the cell smoke discharge valve SV of the power storage cellto the outside of the housing.

191 212 170 191 191 212 170 192 191 192 191 212 170 191 212 170 214 h h h h h h h h h h h h h h d 3 FIG. The through hole, the through hole, and the through holeare arranged in the vertical direction. The cell smoke discharge valve SV is disposed above the through hole. In other words, the through hole, the through hole, and the through holeare provided at a position facing the cell smoke discharge valve SV. The electrical insulation protectorthat closes the through holeis also provided at a position facing the cell smoke discharge valve SV. When the gas is discharged from the cell smoke discharge valve SV, a hole is formed in the electrical insulation protectorlocated below the cell smoke discharge valve SV, and the hole functions as a gas path. Since the through hole, the through hole, and the through holeare provided at a position facing the cell smoke discharge valve SV, when the gas is discharged from the cell smoke discharge valve SV, the gas flows into the space S through the through hole, the through holeand the through hole. The space S extends to the end plateillustrated in.

100 200 19 19 2 FIG. When the gas is discharged from any of the power storage cells, the gas flows through the space S in the first direction and is discharged to the outside of the housingthrough the air-permeable filmsA andB illustrated in.

2 3 FIGS.and 300 216 214 300 300 b d With reference to, the equipmentis provided between the partition walland the end plate. The equipmentmay include a junction box. The equipmentmay include relays, control instruments, and the like.

350 300 350 212 300 350 212 The equipment coolercools the equipment. The equipment cooleris provided between the bottom plateand the equipment. A thermally conductive adhesive agent may be provided between the equipment coolerand the bottom plate.

2 FIG. 3 FIG. 400 400 410 420 214 214 181 182 c With reference to, the refrigerant pipeis a pipe through which refrigerant (water, oil, or the like) flows. The refrigerant pipeincludes an upstream pipeand a downstream pipe. With reference to, the end plateof the peripheral wallis provided with an inflow portand an outflow port.

410 181 410 410 350 410 150 420 420 350 420 150 420 182 181 150 350 410 100 300 182 420 2 FIG. The upstream end of the upstream pipeis connected to the inflow port. The upstream pipehas six downstream ends. One of the downstream ends of the upstream pipeis connected to the equipment cooler. Each of the remaining downstream ends of the upstream pipeis connected to the cooling plate. The downstream pipehas six upstream ends. One of the upstream ends of the downstream pipeis connected to the equipment cooler. Each of the remaining upstream ends of the downstream pipeis connected to the cooling plate. The downstream end of the downstream pipeis connected to the outflow port. The refrigerant supplied from the inflow portflows into the cooling plateand the equipment coolerthrough the upstream pipe, cools the power storage cell(see) and the equipment, and then flows out from the outflow portthrough the downstream pipe.

5 FIG. 10 700 700 100 700 100 700 700 220 With reference to, the power storage devicefurther includes a plurality of spacers. Each spaceris disposed between a pair of power storage cellsadjacent to each other in the first direction. Each spaceris in contact with a pair of power storage cellsadjacent to each other in the first direction. Each spaceris formed in a rectangular shape elongated in the second direction. Each spaceris integrally formed with the upper cover.

7 FIG. 11 100 100 100 101 102 103 101 102 103 100 100 With reference to, the power storage stackincludes a plurality of power storage cells. The plurality of power storage cellsare arranged side by side in the first direction. The plurality of power storage cellsinclude a first power storage cell, a second power storage cell, and a third power storage cell. The first power storage cell, the second power storage celland the third power storage cellare examples of three power storage cellsadjacent to each other among the plurality of power storage cells.

102 101 103 102 1 1 1 1 1 1 The second power storage cellis spaced apart from the first power storage cellin a predetermined direction. The third power storage cellis spaced apart from the second power storage cellin the predetermined direction. The predetermined direction corresponds to one direction of the first direction. In the present embodiment, the predetermined direction corresponds to a direction from the front side of the vehicletoward the rear side of the vehicle. The predetermined direction is not limited to a direction from the front side of the vehicletoward the rear side of the vehicle. For example, the predetermined direction may be a direction from the rear side of the vehicletoward the front side of the vehicle.

101 121 121 121 121 120 120 101 121 121 114 114 101 121 121 114 101 121 121 121 114 101 114 101 a b a b a b a b a a b b a b a a The first power storage cellincludes a pair of external terminalsand. The pair of external terminalsandis an example of the pair of external terminalsandprovided in the first power storage cell. The pair of external terminalsandare provided on the lower surfaceof the cell caseof the first power storage cell. The pair of external terminalsandare spaced apart from each other in the width direction (in other words, the second direction) of the cell caseof the first power storage cell. The external terminalis an example of “a first terminal” in the present disclosure. The pair of external terminalsandmay not be provided on the lower surfaceof the first power storage cell, and may be provided on the side of the lower surfaceof the first power storage cell.

102 122 122 122 122 120 120 102 122 122 114 114 102 122 122 114 102 122 122 122 122 114 102 114 102 a b a b a b a b a a b a b a b a a The second power storage cellincludes a pair of external terminalsand. The pair of external terminalsandis an example of the pair of external terminalsandprovided in the second power storage cell. The pair of external terminalsandare provided on the lower surfaceof the cell caseof the second power storage cell. The pair of external terminalsandare spaced apart from each other in the width direction (in other words, the second direction) of the cell caseof the second power storage cell. Each of the external terminaland the external terminalis an example of “a second terminal” in the present disclosure. The pair of external terminalsandmay not be provided on the lower surfaceof the second power storage cell, and may be provided on the side of the lower surfaceof the second power storage cell.

103 123 123 123 123 120 120 103 123 123 114 114 103 123 123 114 103 123 123 123 114 103 114 103 a b a b a b a b a a b a a b a a The third power storage cellincludes a pair of external terminalsand. The pair of external terminalsandis an example of the pair of external terminalsandprovided in the third power storage cell. The pair of external terminalsandis provided on the lower surfaceof the cell caseof the third power storage cell. The pair of external terminalsandare spaced apart from each other in the width direction (in other words, the second direction) of the cell caseof the third power storage cell. The external terminalis an example of “a third terminal” in the present disclosure. The pair of external terminalsandmay not be provided on the lower surfaceof the third power storage cell, and may be provided on the side of the lower surfaceof the third power storage cell.

121 122 123 121 122 123 121 122 123 121 122 123 a a a b b b a a a b b b In the present embodiment, the external terminals,, andare positive terminals, and the external terminals,, andare negative terminals. However, the external terminals,, andmay be negative terminals, and the external terminals,, andmay be positive terminals.

850 121 122 122 123 850 801 802 801 800 121 122 102 101 801 802 800 122 123 102 103 802 b a b a b a b a The conductive memberis connected to, for example, the external terminal,,and. More specifically, the conductive memberincludes a first bus barand a second bus bar. The first bus barcorresponds to the bus barthat connects the external terminaland the external terminal. The second power storage cellis electrically connected to the first power storage cellby the first bus bar. The second bus barcorresponds to the bus barthat connects the external terminaland the external terminal. The second power storage cellis electrically connected to the third power storage cellby the second bus bar.

700 701 702 701 700 101 102 701 101 102 702 700 102 103 702 102 103 The plurality of spacersmentioned above include a first spacerand a second spacer. The first spacercorresponds to the spacerdisposed between the first power storage celland the second power storage cell. The first spaceris in contact with the first power storage celland the second power storage cell. The second spacercorresponds to the spacerdisposed between the second power storage celland the third power storage cell. The second spaceris in contact with the second power storage celland the third power storage cell.

701 102 702 102 10 102 121 122 122 123 850 121 122 801 122 123 802 10 b a b a b a b a The first spaceris disposed on one side of the second power storage cellin the first direction, and the second spaceris disposed on the other side of the second power storage cellin the first direction. Thus, when an impact is applied to the power storage devicefrom a predetermined direction or a direction opposite to the predetermined direction, the second power storage cellis prevented from being moved in the predetermined direction or a direction opposite to the predetermined direction. Therefore, the external terminals,,andare less likely to be detached from the conductive member. For example, the external terminaland the external terminalare less likely to be detached from the first bus bar, and the external terminaland the external terminalare less likely to be detached from the second bus bar. Therefore, when an impact is applied to the power storage devicefrom a predetermined direction or a direction opposite to the predetermined direction, a connection failure is prevented from occurring in the electrode terminal. Since a connection failure is prevented from occurring in the electrode terminal, a short circuit is prevented from being caused by the connection failure.

10 101 102 101 103 102 850 10 701 101 102 702 102 103 121 114 101 122 122 114 102 123 114 103 850 121 122 122 123 10 102 121 122 122 123 850 10 10 b a a b a a a b a b a b a b a As described above, the power storage deviceaccording to the present embodiment includes a first power storage cell, a second power storage cellspaced apart from the first power storage cellin the predetermined direction, a third power storage cellspaced apart from the second power storage cellin the predetermined direction, and a conductive member. The power storage devicefurther includes a first spacerdisposed between the first power storage celland the second power storage cell, and a second spacerdisposed between the second power storage celland the third power storage cell. An external terminalis provided on the side of the lower surfaceof the first power storage cell. External terminalsandare provided on the side of the lower surfaceof the second power storage cell. An external terminalis provided on the side of the lower surfaceof the third power storage cell. The conductive memberis connected to the external terminal,,and. Thus, when an impact is applied to the power storage devicefrom the predetermined direction or a direction opposite to the predetermined direction, the second power storage cellis prevented from being moved in the predetermined direction or a direction opposite to the predetermined direction. Therefore, the external terminals,,andare less likely to be detached from the conductive member. Therefore, according to the power storage deviceof the present embodiment, when an impact is applied to the power storage devicefrom a predetermined direction or a direction opposite to the predetermined direction, a connection failure is prevented from occurring in the electrode terminal.

10 100 701 702 120 120 850 1 a b In general, in a vehicle in which the power storage device is mounted below a floor panel, if the front side of the power storage device comes into contact with an obstacle on a road surface during traveling, the power storage cell may be moved in a predetermined direction or in a direction opposite to the predetermined direction, which may detach the external terminal of the power storage cell from the conductive member. However, according to the present embodiment, even when the power storage devicecomes into contact with an obstacle on a road surface, the power storage cellis prevented from being moved in a predetermined direction or a direction opposite to the predetermined direction by the first spacerand the second spacer, and thereby, the external terminalsandare less likely to be detached from the conductive member. Therefore, according to the vehicleof the present embodiment, a connection failure is prevented from occurring in the electrode terminal.

700 220 701 702 220 10 10 10 701 702 220 701 702 220 701 702 220 Each spaceris formed integrally with the upper cover. In other words, each of the first spacerand the second spaceris integrally formed with the upper cover. As a result, the number of components constituting the power storage deviceis reduced. Therefore, according to the power storage deviceof the present embodiment, the ease of assembly of the power storage deviceis improved. When each of the first spacerand the second spaceris integrally formed with the upper cover, and when the first spacer, the second spacerand the upper coverare made of resin, the first spacer, the second spacerand the upper covermay be manufactured as a single component by resin molding, which simplifies the manufacturing process.

700 100 701 101 102 702 102 103 10 102 Each spaceris in contact with a pair of power storage cellsadjacent to each other in the first direction. In other words, the first spaceris in contact with the first power storage celland the second power storage cell, and the second spaceris in contact with the second power storage celland the third power storage cell. Thus, when an impact is applied to the power storage devicefrom a predetermined direction or a direction opposite to the predetermined direction, the second power storage cellis prevented from being moved in the predetermined direction or a direction opposite to the predetermined direction.

8 FIG. 10 700 10 700 700 is a diagram illustrating a spacer according to a first modification. In the above embodiment, the power storage deviceincludes a plurality of spacers. However, in the first modification, the power storage deviceincludes a plurality of spacersA instead of the plurality of spacers.

700 701 702 701 700 101 102 702 700 102 103 700 100 701 101 102 702 102 103 The plurality of spacersA include a first spacerA and a second spacerA. The first spacerA corresponds to the spacerA disposed between the first power storage celland the second power storage cell. The second spacerA corresponds to the spacerA disposed between the second power storage celland the third power storage cell. Each spacerA is in contact with a pair of power storage cellsadjacent to each other in the first direction. In other words, the first spacerA is in contact with the first power storage celland the second power storage cell, and the second spacerA is in contact with the second power storage celland the third power storage cell.

700 700 700 220 701 702 220 700 220 The spacerA is different from the spacerin that each spacerA is formed separately from the upper cover. In other words, each of the first spacerA and the second spacerA is formed separately from the upper cover. Each spacerA is fixed to the upper cover.

700 701 702 Each spacerA may be made of an elastic member. In other words, each of the first spacerA and the second spacerA may be made of an elastic member.

700 700 701 702 220 701 702 220 The spacerA is the same as the spacerin the other points. Since each of the first spacerA and the second spacerA is formed separately from the upper cover, the first spacerA and the second spacerA may be made of a member different from the upper cover.

700 100 700 101 102 701 102 103 702 When each spacerA is made of an elastic member, the power storage celladjacent to the spacerA is prevented from being damaged. In other words, the first power storage celland the second power storage celladjacent to the first spacerA is prevented from being damaged, and the second power storage celland the third power storage celladjacent to the second spacerA is prevented from being damaged.

9 FIG. 10 700 10 700 700 is a view illustrating a spacer according to a second modification. In the above embodiment, the power storage deviceincludes a plurality of spacers. However, in the second modification, the power storage deviceincludes a plurality of spacersB instead of the plurality of spacers.

700 701 702 701 700 101 102 702 700 102 103 700 100 701 101 102 702 102 103 The plurality of spacersB include a first spacerB and a second spacerB. The first spacerB corresponds to the spacerB disposed between the first power storage celland the second power storage cell. The second spacerB corresponds to the spacerB disposed between the second power storage celland the third power storage cell. Each spacerB is in contact with a pair of power storage cellsadjacent to each other in the first direction. In other words, the first spacerB is in contact with the first power storage celland the second power storage cell, and the second spacerB is in contact with the second power storage celland the third power storage cell.

700 700 700 220 701 702 220 The spacerB is different from the spacerin that each spacerB is formed separately from the upper cover. In other words, each of the first spacerB and the second spacerB is formed separately from the upper cover.

700 701 702 700 11 700 100 The plurality of spacersB are integrally formed. In other words, the first spacerB and the second spacerB are integrally formed. The plurality of spacersB are fitted into the power storage stackin such a manner that each spacerB is disposed between a pair of power storage cellsadjacent to each other in the first direction.

700 701 702 Each spacerB may be made of an elastic member. In other words, each of the first spacerB and the second spacerB may be made of an elastic member.

700 700 700 10 10 10 The spacerB is the same as the spacerin the other points. Since the plurality of spacersB are integrally formed, the number of components constituting the power storage deviceis reduced. Therefore, according to the power storage deviceof the second modification, the ease of assembly of the power storage deviceis improved.

700 100 700 When each spacerB is made of an elastic member, the power storage celladjacent to the spacerB is prevented from being damaged.

Although the embodiments of the present disclosure have been described in the above, it should be understood that the embodiments disclosed herein are illustrative and non-restrictive in all respects. It is intended that the scope of the present disclosure is defined by the appended claims, and encompasses all modifications equivalent in meaning and scope to the claims.